Wahl Digi-Stem DST600 Series User Manual page 3

Self-checking Electronic Circuitry: Meter repetitively checks the electronics
•
accuracy by measurement of on-board ultra-stable, low ppm precision
resistors against embedded firmware values and displays "err" in the event
the electronics is out by more than ±0.5°F (0.3°C). The self-checking
electronic circuit may be tested by rapidly changing the temperature of the
sensor, such as placing from room temperature into ice bath or heated
process. Unit will display "err" occasionally when going through rapid
changes and will return to normal as temperature begins to stabilize (usually
within 10° of final temperature). This serves as a test and indicator that the
self-checking circuitry is functioning properly.
Probe Error checking: Checks for open wire, open sensor, shorted sensor,
•
incorrect wiring.
Probe ID feature: Alerts the operator that the probe has been changed and
•
the calibration may be void. Requires the use of calibration software to
calibrate and associate the new probe with the meter. Available on fixed
stem and remotes less than 25 meters.
Programmable R0: Allows programming of the sensing probes specific R0
•
value into the meter for accurate temperature calibration.
Optional versions include "I" version for International shipping using a AA
•
battery, "R" version with adjustable resolution and "P" version for panel mount
option.
Models:
DST600 – Temperature Indicating Device – Nema 4X rated Stainless Steel
enclosure
DST610/611 – Temperature Indicating Device with independent secondary
RTD sensor and terminal block connection
DST620/621 – Temperature Indicating Device with independent secondary
RTD sensor and 4-20mA transmitter
DST640 – Harsh environment Temperature Indicating Device – All Stainless
Steel enclosure and increased RFI protection.
DST650/651 – Harsh environment Temperature Indicating Device - with
independent secondary RTD sensor with terminal block connection
DST660/661 – Harsh environment Temperature Indicating Device - with
independent secondary RTD sensor with 4-20mA transmitter
DST600 Series USER MANUAL
Stainless Steel
Housing with
Polycarbonate H
Frame
DST600
3 of 20
All Stainless Steel
Housing with Stainless
Steel H Frame
DST640