User's Manual

MAINTENANCE AND TROUBLESHOOTING
Calibration Overview
20 LDT-5525
CHAPTER 3

Recommended Equipment
Recommended test equipment for calibrating the LDT-5525 Temperature
Controller is listed in Table 3.1. Equipment other than that shown in the table may
be used if the specifications meet or exceed those listed.
Table 3.1
Environmental Conditions
Calibrate this instrument under laboratory conditions. We recommend calibration
at 23
o
C ± 1.0
o
C. When necessary, however, the LDT-5525 Temperature
Controller may be calibrated at its intended use temperature if this is within the
specified operating temperature range of 0 to 40
o
C.
Warm Up
The LDT-5525 Temperature Controller should be allowed to warm up for at least 1
hour before calibration.
DESCRIPTION MFG / MODEL SPECIFICATION
DMM HP 3457A DC Amps (@ 1.0A): +0.02%
Resistance (@ 10Ω): 0.02%
0.1 µA or 0.1 mW resolution
Resistors Metal Film 15 KΩ (for ITE calibration)
4 KΩ and 40 KΩ (for 100 mA calibration)
4 KΩ and 400 KΩ (for 10 mA calibration)
4 KΩ and 10 KΩ (for LM335 calibration)
10 KΩ and 20 KΩ (for AD590 calibration)
High Power 1 Ω, 20W, low TCR (for ITE calibration)