TB 9-5855-1892-35
NOTE
TC1 is labeled with a + sign.
NOTE
Verify thermocouple leads have not moved and are still located
in thermally conductive paste and are not touching sides of
BAR TARGET window.
f. Ensure TI ON - OFF switch is in OFF position.
g.
Connect digital voltmeter to
115 V ac
power source, turn
power on, and
allow time
for digital voltmeter to warm up and stabilize.
a. Performance Check
(1) Set TI ON - OFF switch to ON (green READY lamp will momentarily
illuminate).
(2) Wait for READY lamp to illuminate and remain illuminated for a minimum of 8
minutes.
(3) Perform steps (a) through (g) below:
(a) Monitor digital multimeter indications for a minimum of 2 minutes.
(b) Record digital multimeter maximum and minimum indications on BAR
Target Temperature Worksheet (appendix A). Make copies of BAR Target Temperature
Worksheet as required.
(c) Use formula provided on BAR Target Temperature Worksheet to compute
temperature equivalent values for T max and T min.
(d) Average T max and T min values to determine current temperature and
record on BAR Target Temperature Worksheet.
(e) Use formula provided on BAR Target Temperature Worksheet to calculate
temperature error.
(f) Temperature error will be between -0.45 C and +0.45 C; if not, perform
(g) Set TI ON- OFF switch to OFF.
(4) Loosen MOUNTING POST CLAMP (fig. 5) on thermocouple No. 2 (TC2) and
slide LABORATORY CLAMP (fig. 6) back (away from TI) in MOUNTING POST CLAMP
until thermocouple is outside TI, then tighten MOUNTING POST CLAMP (fig. 5).
NOTE
Apply cotton tip applicator gently to blackened painted
surfaces to prevent rubbing off black paint.