(c) ",F" and ",C" switch: This is a "push/push" switch. When this switch
is "in", the engineering units of the readout are in Fahrenheit and the scale
of the Analog Out is 1 mV per ,F. When this switch is "out", the
engineering units of the readout are Centigrade and the scale of the Analog
Out is 1 mV per ,C.
(d) ".01 & .1" switch: This is a "push/push" switch. When this switch is
"in", the readout is in tenths (0.1) of a degree; either Fahrenheit or
Centigrade as determined by the ",F & ,C" switch. When this switch is
"out", the readout is in hundredths (0.01) of a degree, either Fahrenheit or
Centigrade, as determined by the ",F & ,C" switch.
NOTE: In the hundredth (0.01) degree position, the unit is not designed to measure
greater than 100,C or 232,F.
(e) "Cal & Read" switch: This is a "push/push" switch. When this switch
is "in", the readout indicates the temperature at the sensor. The sensitivity
is determined by the "01. & .1" switch. The engineering units are
determined by the ",F & ,C" switch. When this switch is "out", the
readout should indicate the temperature as determined by the "300/572 &
0/32" switch. (see 5e (4) (f)
(f) "300/572 & 0/32" switch: This is a "push/push" switch. When this
switch is "in" (see note) the readout should read 0, C or 32, F, depending
on the position of the ",F & ,C" switch. The ".01 &.1" switch determines
sensitivity. When this switch is "out", the readout should read 300,C or
572,F, depending on the position of the ,F & ,C" switch.
NOTE: The ".01 & .1" switch must be "in" at this time. The "Cal & Read" switch must be
"out" for this switch to have any effect.
(5) Battery Charging.
(a) Unit must be plugged in for a minimum of twelve (12) hours to insure
a fully charged battery, before using it without line power.
(b) The unit will operate while the battery is being charged.
(c) When using this instrument on battery power alone, the battery should
be checked before and after each important measurement.
f. OPERATING PROCEDURES.
(1) Press Power switch "on". Display should light up.
(2) Check the battery by checking calibration at 572,F (see 5e
(3) Allow fifteen (15) minutes warm-up.
(4) Set Front Panel switches to desired sensitivity and engineering units. (see 5e
(4).
(5) Push the "Cal & Read" switch "in".
(6) Place the probe into the atmosphere under test and allow a ten second settling
time.
(7) Read temperature directly on readout.
g. THEORY OF OPERATION.
(1) Introduction.
The 4100 DTI converts the resistance of a calibrated RTD sensor to a digital Light
Emitting Diode (LED) display in degrees Celsius or Fahrenheit and a
corresponding analog output voltage, selectable by a Front Panel Switch. The
Previous Page
