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HP / Agilent 2804A Quartz Thermometer
The HP 2804A Quartz Thermometer allows you
to easily measure temperature with exceptionally high accuracy and
resolution. Absolute accuracy is ±40 millidegrees Celsius over the range
of -50°C to 150°C, NIST traceable to ITS-90. The useable resolution of 0
.0001 °C allows you to measure temperature changes that could not be
detected by other digital thermometers.
The HP 2804A can be used with one or two
temperature sensing probes, The temperature of either probe, or their
difference, can be measured and displayed under pushbutton control.
Display resolution is selectable from 0.01 to 0.0001°C (0.1 to 0.001°F)
by pushbuttons. An internal switch allows you to easily select measurement
in the Celsius or Fahrenheit temperature scale. Temperature is measured
and displayed automatically with the microprocessor and electronics
provided in the HP 2804A package.
There is no need to balance a bridge,
perform calculations using resistance or voltage-temperature tables or
curves, or to use calibration correction tables. The only adjustment
necessary to remove effects of thermal history on the sensor is a simple
ice point or triple point calibration adjustment using the front panel
thumbwheel switches.
Features:
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±0.04°C absolute accuracy
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0.0001 °C or 0 .001 ° F resolution
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-80° to +250°C range
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Display of absolute or differential
temperature
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Flexible HP-16 system interface
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Variable resolution analog output
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Easy ice-point or triple-point
adjustment
Specifications:
Performance
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Range: -80 to 2500C
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Absolute accuracy: HP 2804A with HP
18110A, or HP 18111A Quartz Probe -
±0.040°C from -50 to 150°C
±0.075°C from -80 to 250°C
NIST traceable to ITS-90
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Resolution: three levels can be
selected:
Level of selection |
Resolution |
Nominal time between readings In
seconds |
| °C |
°F |
T1
or T2 |
T1
- T2 |
Low
Medium
High |
0.01
0.001
0.0001 |
0.1
0.01
0.001 |
0.1
1
10 |
0.2
2
20 |
General
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Display: 7-digit LED with polarity,
decimal, and degree C or F annunciator.
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Probes: laboratory probes are available
for use with the HP 2804A,
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