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4 Quick Start
4.1 Unpacking
Unpack the thermometer carefully and inspect it for any damage that may
have occurred during shipment. If there is shipping damage, notify the carrier
immediately.
Verify that the following components are present:
•
1502A Thermometer
•
Extra Probe Connector
•
Power Cord
•
Manual
•
Probe (optional—must be purchased separately)
•
Battery Pack (optional—must be purchased separately)
4.2 Power
Your 1502A is configured for either 115 VAC (±10%) operation or 230 VAC
(±10%) operation. Be careful to only connect the 1502A to a mains supply of
the correct voltage. Otherwise, the instrument may be damaged. The required
voltage is indicated on the back of the 1502A. The 1502A may draw up to 10
VA. The IEC type power cord connects to the back of the 1502A. The cord
must be plugged in to a grounded outlet. The power switch is located at the
back of the 1502A.
When the 1502A is powered on, wait briefly while it initializes. It will then begin
measuring and displaying temperature.
Because of the quality of the components used in the 1502A, it exhibits nearly
negligible drift as it warms up. The warm-up drift is typically less than 5 ppm.
Nevertheless, to ensure the best accuracy and stability, you may want to allow
the 1502A to warm up for ten minutes before use.
Accurate measurement requires that the probe be connected properly to the
input and the correct probe characterization set.
4.3 Connecting the Probe
The RTD or SPRT probe connects to the back of the 1502A using a five-pin
DIN plug. Figure 1 shows how a four-wire probe is wired to the five-pin DIN
connector. One pair of wires attaches to pins 1 and 2 and the other pair atta-
ches to pins 4 and 5. (Pins 1 and 5 source current and pins 2 and 4 sense the
potential.) If a shield wire is present it should be connected to pin 3.
A two-wire probe can also be used with the 1502A. It is connected by attach-
ing one wire to both pins 1 and 2 of the plug and the other wire to both pins 4
and 5. If a shield wire is present it should be connected to pin 3. Accuracy may
be significantly degraded using a two-wire connection because of lead resis
-
tance.
1502A Manual Rev. 952801 9
4 Quick Start
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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