Operation
3-12
Step 3: Configure channels
1. Press CONFIG-CHAN, select INTERNAL-CHANS,
then press ENTER. The display will appear as follows:
SET INTERNAL CHANS
1=DCV 2=DCV 3= DCV 4=DCV 5=DCV
2. Using the range and cursor keys, set the channel func-
tions as follows:
Channel 1: JN1 (or JN2-JN5 if using those junctions)
Channels 2-10: TMP for thermocouple channels, --- for
unused channels, or other valid function if used.
3. After setting all channel functions, press ENTER to re-
turn to normal display.
Step 4: Configure and scan channels
1. From normal display, press CONFIG-SCAN. The in-
strument will display the following:
SCAN OPERATION
INTERNAL EXTERNAL RATIO DELTA
2. Select INTERNAL, then press ENTER.
3. Press SCAN, then follow the prompts to begin scanning.
See paragraph 3.4.4 for details.
■ Manual temperature measurements
In addition to scanning through channels to make tempera-
ture measurements, you can also make such measurements
manually. In order to do so, you must first acquire the refer-
ence junction temperature and then manually close or scan
through thermocouple channels. Note that the reference
junction acquisition process should be repeated often, partic-
ularly if the ambient temperature changes; otherwise, tem-
perature reading accuracy will be reduced.
NOTE
If you attempt to measure thermocouple
temperature before acquiring the reference
junction, the front panel “ERR” annuncia-
tor will indicate that an error has occurred.
Step 1: Connect Thermocouples
Connect your thermocouples to the desired channels, as cov-
ered in Figure 2-5, Section 2.
Step 2: Acquire reference junction temperature
1. Press the TEMP key to place the instrument in the tem-
perature measurement mode.
2. Press CHAN. The unit will display the following:
CHANNEL SELECTION
CLOSE-CHANNEL OPEN-ALL-CHANNELS
3. Select CLOSE-CHANNEL, then press ENTER. The
display will appear as follows:
ENTER CHAN#01 (1-10)
4. If necessary, use the range and cursor keys to select
channel 1 (reference junction channel), then press EN-
TER. The unit will return to normal display, and it
should indicate that channel 1 is closed.
5. Press CONFIG-TEMP. The Model 2001/2002 will dis-
play the following message:
CONFIG TEMPERATURE
SENSOR UNITS SPEED FILTER RESOLN
6. Choose SENSOR, then press ENTER. The unit will dis-
play the sensor type menu:
TEMP SENSOR TYPE
4-WIRE-RTD RTD THERMOCOUPLE
7. Select THERMOCOUPLE, then press ENTER. The
thermocouple setup menu will be displayed:
THERMOCOUPLE SETUP
THERMOCOUPLE-TYPE REF-JUNCTIONS
8. Select THERMOCOUPLE-TYPE, then press ENTER.
Select your thermocouple type as outlined above. Select
REF-JUNCTIONS, then press ENTER. The following
will be displayed:
CONFIGURE REFJCNS
JCN1 JCN2 JCN3 JCN4 JCN5
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