ENGLISH
1. Power source INPUT (USB-A)
2. Load OUTPUT (USB-A)
3. Mode button
4. LCD display
A. DC voltage
B. DC current
C. Capacity/charge delivered (mAh)
D. Energy delivered (Wh)
E. Resistance (Ω)
F. Elapsed Time (Hour:Min:Sec)
G. Memory Location (M:1, M:2, etc)
H. Memory Clear/Reset ("CLR")
NOTE: No user-serviceable parts inside.
FIG. 1
FIG. 2
32 4 1
ET900
INSTRUCTION MANUAL - USB DIGITAL METER - TYPE A
Default Screen
##.## V
#.## A
###### mAh ####Wh
###:##:## ###.#Ω
E
D
A
C
B
F
Memory Screen
##.## V CLR
#.## A
###### mAh ####Wh
###:##:## ###.#Ω
A
F
D
C
B
E
HH
G
OPERATING INSTRUCTIONS
MONITORING MODE
NOTE: The input plug must be connected to a powered USB
device before the downstream device is connected to the
output port.
"Downstream device" refers to any device that has
the ability to draw current over USB power source.
1. Connect the input connector to the USB port to be monitored.
• The display will turn on with Klein Tools logo screen and move
quickly to the Default Screen (FIG 2).
• If the source port has power, it will only display a live voltage
reading within the operating range, 3-20V DC.
NOTE: Most USB
ports deliver ~5V DC.
2. Connect the device being charged to the output port of the
ET900. The display will show actual readings (FIG. 2).
NOTE: "mAh" resets only when source is disconnected.
CLEANING
Be sure the tester is disconnected from both the input and
output port. Use clean, dry, soft lint-free cloth to wipe down
the entire unit.
•
Do NOT use abrasive cleaners or solvents.
STORAGE
Do not expose to high temperatures or humidity. After a period
of storage in extreme conditions exceeding the limits mentioned
in the General Specifications section, allow the tester to return to
normal operating conditions before using.
DISPOSAL / RECYCLE
Do not place equipment and its accessories in the trash.
Items must be properly disposed of in accordance with
local regulations. Please see www.epa.gov/recycle for
additional information.
CUSTOMER SERVICE
KLEIN TOOLS, INC.
450 Bond Street, Lincolnshire, IL 60069 1-800-553-4676
[email protected] www.kleintools.com
WARNINGS
T
o ensure safe operation and service of the tester, follow these
instructions. Failure to observe these warnings can result in
severe injury or death.
• This tester will NOT display current below 50 mA, even if it is
allowing this to pass through.
NOTE: The display will show
zero current.
• DO NOT use with ports that operate outside of the rated voltage
and current .
• Before each use verify tester operation by measuring a known
voltage or current.
• NEVER use on a circuit with voltage or current that exceeds the
maximums specified for this device. Use caution when working
with voltages above 25V AC RMS or 60V DC. Such voltages
pose a shock hazard.
Voltage above 24V DC will damage
product.
Display will read "OVERLOAD" in this condition and
output port will be disabled.
• DO NOT use during electrical storms or in wet weather.
• DO NOT use if tester appears to be damaged.
• Always adhere to local and national safety codes. Use personal
protective equipment to prevent shock and arc blast injury
where hazardous live conductors are exposed.
CAUTION
• DO NOT attempt to repair this tester. there are no serviceable parts.
• DO NOT modify this tester in any way.
• DO NOT expose to extremes in temperature or high humidity.
• This tester will NOT be able to monitor a source port if any of
the following conditions occur:
• The USB port or plug is not properly connected.
• The source device shuts down. Some portable storage
batteries have auto-shutdown or standby modes to save
power if no load is detected from downstream device.
SYMBOLS ON TESTER
Important information:
It is important that
users of this tester read,
understand, and follow
all warnings, cautions,
safety information,
and instructions in this
manual before operating
this tester. Failure to
follow instructions
could result in death or
serious injury.
Warning – Risk of electric shock
Read instructions
This product has been independently
tested by Intertek and meets applicable
published standards
Conformité Européenne: Conforms with
European Economic Area directives
UKCA - UK Conformity Assessment
USB
GENERAL SPECIFICATIONS
The Klein Tools ET900 is a USB digital meter for USB-A (Type-A) ports. It
accurately and reliably measures and displays the USB port voltage, current,
capacity, energy and resistance simultaneously. It can function with any USB-A
port that has the ability to deliver power. It requires no batteries, as it draws
power from the power source.
• Measurement Range:
Voltage: 3 to 20V DC, +/-1% (+/-2 Bytes) accuracy
Current: 0.05 to 3A, +/-1% (+/-2 Bytes) accuracy
Charge delivered: 99,999mAh MAX*
Energy delivered: 999Wh MAX*
Resistance: 400Ω MAX
Elapsed Time: Up to 999 hours, 59 min, 59 sec*
*Based on display layout
• Operating and Storage Altitude: Up to 6562 ft. (2000 m)
• Operating and Storage Temp: 14° to 122°F (-10° to 50°C)
• Relative Humidity: <95% non-condensing
• Dimensions: Tester: 2.84" × 1.25" × 0.565" (72 × 32 × 14 mm)
Cable: Approx. 4" (100 mm)
• Weight: 1.1 oz. (31 g)
• Pollution degree: 2
• Drop Protection: 6.6 ft. (2 m)
• Ingress Protection: IP20
• Compatibility: Qualcomm Quick Charge
®
Compatible
• Standards:
Conforms to UL STD. 61010-1, 61010-2-030.
Certified to CSA STD. C22.2 No. 61010-1,
61010-2-030.
Specifications subject to change.
FUNCTION BUTTONS (FIG. 1)
MODE BUTTON
3
(Screen Toggle/Data Storage/Memory reset)
The Mode button serves three purposes:
1. Switch between screens (FIG. 2):
From the default screen, pressing and releasing once will switch to the
Memory Screen.
2. Data/Memory Storage:
To record a reading during live monitoring event, press and hold the Mode
button for 3 seconds. Release the button after the memory location (i.e. M:1)
flashes momentarily on the screen. The next set of readings will be stored at
the next available location until all 10 memory locations are used.
NOTE: Once
all 10 locations are used, subsequent readings will overwrite them, beginning
with M:1. NOTE: When in the Memory screen, if the Mode button is not
pressed within 3 seconds, the display will return to the Default screen.
3. Memory Recall/Reset:
When in the Memory Screen, repeated pressing will cycle through all 10
memory locations, beginning with M:1. You must scroll through all 10
locations to exit.
NOTE: If no data has been stored into memory, pressing
the Mode button will do nothing. The ET900 will only display memory
locations containing stored data.
To reset or erase all data in memory, press and hold the Mode button
for 5 seconds from the Memory screen until the letters CLR flash in the
upper right corner (FIG. 2). All data in memory will be erased in all 10
memory locations.
BASED ON: 1330562 Rev 09/21 E
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