Omega HH804, Instruction Sheet

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HH804
HH804U
DUAL INPUT RTD DIGITAL THERMOMETER
HH804
Main Display
Third Display Second Display
1
4
7
10
3
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9
12
2
5
8
11
OMEGAnet
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It is the policy of OMEGA Engineering, Inc. to comply with all
worldwide safety and EMC/EMI regulations that apply. OMEGA
is constantly pursuing certification of its products to the
European New Approach Directives. OMEGA will add the CE
mark to every appropriate device upon certification.
The information contained in this document is believed to be
correct, but OMEGA accepts no liability for any errors it
contains, and reserves the right to alter specifications without
notice.
WARNING: These products are not designed for use in, and
should not be used for, human applications.
INTRODUCTION
This instrument is a 4½ digit, compact-sized portable
digital thermometer designed to use external 100 Ω Platinum
RTD as temperature sensor. Temperature indication follows
Reference Temperature/Resistance Tables (Pt385 for Euro-
pean Curve, Alpha=.00385. Pt3926 for American Curve,
Alpha=.003926. Pt3916 for Japan Curve, Alpha=.003916.)
SAFETY INFORMATION
It is recommended that you read the safety and operation
instructions before using the thermometer.
WARNING
To avoid electrical shock, do not use this instrument
when working voltages at the measurement surface
over 24V AC or DC.
WARNING
To avoid damage or burns, do not make temperature
measurement in microwave ovens.
SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range:
Pt385(100
Ω ) -200°C to 800°C, (-328°F to 1472°F)
Pt3916/Pt3926(100 Ω ) -200°C to 630°C, (-328°F to 1166°F)
Resolution: 0.1°C or 0.2°F
Accuracy:
Accuracy is specified for operating temperatures over the
range of 18°C to 28°C (64°F to 82°F), for 1 year, not includ-
ing RTD probe error.
±(0.05% rdg + 0.2°C) on °C scale
±(0.05% rdg + 0.4°F) on °F scale
Temperature Coefficient:
0.1 times the applicable accuracy specification per °C from
0°C to 18°C and 28°C to 50°C (32°F to 64°F and 82°F to
122°F).
Input Protection:
24V dc or 24V ac rms maximum input voltage on any com-
bination of input pins.
Maximum Differential Common Mode Voltage (Maxi-
mum Voltage between T1 and T2 during measurement):
1volt.
Reading Rate: 1 time per second.
Input Connector:
Accepts for RTD 3 wires or 4 wires subminiature 4-Prong
type connectors (flat blades spaced 7.9mm, center to center).
ENVIRONMENTAL
Ambient Operating Ranges:
0°C to 50°C (32°F to 122°F) <80% R.H.
Storage Temperature:
-20°C to 60°C (-4°F to 140°F) <70% R.H.
GENERAL
Display: 4½ digit liquid crystal display (LCD) with maxi-
mum reading of 19999.
Overload: “----.-” or “OL” is display.
Battery: 1.5V x 4 PCS (SIZE AAA) UM-4 R03.
Battery Life: 200 hours typical with carbon zinc battery.
Reading Rate: 1 time per second.
Auto power off: 30 minutes, press power key to resume
operation.
Dimensions: 160mm(H) x83mm(W) x 38mm(D).
Weight: Approx. 260g including batteries.
Wire Communication Protocol:
19200 baud rate. (HH804U)
External Connections: (HH804U)
1. USB Port
2. DC power JACK(12V)
OPERATING INSTRUCTIONS
1. “ ” Power Button
The “ ” key turns the thermometer on or off. In the SET
mode cannot be powered off. Exit SET mode to power off.
APO function mode
Press “
” power key for more than 6 seconds to disable the
auto-power function. The display will show “APO OFF”.
2. °C/°F Selecting the Temperature Scale (Main
display)
Reading the main displayed in either degrees Celsius(°C) or
degrees Fahrenheit(°F). When the thermometer is turned on,
it is set to the temperature scale that was in use when the
thermometer was last turned off. To change the temperature
scale, press the “°C/°F” key.
3. “ ” Display Back-Light
Press the “ ” key to turn on or turn off the Back-Light.
4. “T1 T2/T1-T2” Main display Input Selection
The input selection indicates which input is selected for main
display; T1 probe, T2 probe or the difference between the
two probes (T1-T2). When the thermometer is turned on, it is
set to T1, when main display input selected T1, then T1 input
can select alternate of probe by pressing
Pt385/Pt3926/Pt3916 key switch.
5. “TYPE”(Pt385/Pt3926/Pt3916) Input RTD
Probe Select (only Main display)
The “TYPE” key switches the T1 input to select the Pt385,
Pt3926 or Pt3916 RTD probe as input, when main display
input selected T1. When the thermometer is turned on, it is
set to the probe selected that was in use when the thermome-
ter was last turned off.
6. “MIN/MAX” with Time record mode
(only Main display)
Press “MIN/MAX” key to enter the MIN MAX Recording
mode, (displays the Maximum reading with time, Minimum
reading with time and Average reading stored in record
mode). In the this mode the automatic power-off feature is
disabled and “
” key, “°C/°F” key, “REL” key, “SET” key,
“Hi/Lo Limits” key and main display “T1 T2 T1-T2” key,
“TYPE” key are disabled. The beeper emits a tone when a
new minimum or maximum value is recorded.
Press “MIN/MAX” key to cycle through the MAX, MIN and
AVG readings. If an overload is recorded, the averaging
function is stopped. In this mode, press the “HOLD” key to
stop the recording of readings, all values are held, press again
to restart recording.
M4730/0410
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