TB 9-4920-469-24
8. Temperature (Model TT1000A)
a. Performance Check
(1) Connect K-Type Thermocouple Wire to the TI connector, observing polarity.
(2) Set cool/heat source to ambient temperature (22 C/71.6 F) and allow time
to stabilize.
(3) Immerse the K-Type Thermocouple Wire and into the cold well of the cool/heat source.
(4) The TI and cool/heat source indications must agree within 1 C (1.8 F) of each other.
(5) Disconnect test setup.
(6) Remove TI from its case and short TP4 to COM and TP3 to TP1.
(7) Short TI test leads together.
(8) Set TI controls as indicated in (a) through (e) below:
(a) FUNCTION
TEMP MEASURE
(b) RESISTANCE RANGE
20 OHMS
TEMP ADJ
(c)
fully CCW
(d) SYSTEM RES
fully CCW
(e) ON/OFF
ON
(9) TI display must indicate 000 C or -000 C.
(10) Disconnect TI test leads from each other. TI display must indicate OPEN -1 C.
(11) Set TI ON/OFF switch to OFF.
(12) Set multimeter to DCV and 100 mV range. Perform multimeter Math Null as necessary.
(13)Connect TI test leads to multimeter input while observing polarity.
(14)Set TI FUNCTION switch to INDICATOR TEST and ON/OFF switch to ON.
(15)Rotate TI TEMP ADJ control until TI display indicates the first value listed in
the applied column of table 3.
Table 3. Temperature Accuracy Check (Model TT-1000A).
Multimeter indications
TI Applied
(mV dc)
C
Min
Max
25
0.9597
1.0408
100
4.0549
4.1376
200
8.0985
8.1784
300
12.1671
12.2500
400
16.3549
16.4394
500
20.6017
20.6869
600
24.8630
24.9480
700
29.0871
29.1709
800
33.2344
33.3164
900
37.2859
37.3659
1000
41.2366
41.3146
1100
45.0808
45.1565
1200
48.8017
48.8747
(16)If multimeter does not indicate within the corresponding values listed in the
Limits column of table 3, perform b below.
