Signet 8900, Руководство пользователя

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47 Signet 8900 Multi-Parameter
Appendix F: BTU Quick Start Guide
This guide outlines how to confi gure the 8900 Multi-Parameter to calculate Power and Energy. There are some limitations that must be
known and requirements that must be adhered to in order for the calculation to work properly.
The user can select power units, energy units, can show only the heating totalizer, show only the cooling totalizer or show both. The
heating and cooling totalizers are all permanent totalizers. The user can also enter the fl uid density and heat capacity to obtain higher
accuracy. The power measurements can be used as a relay source to control alarms or as a source for a 4 to 20 mA output.
Channel 1 Type:
Flow >
Channel 2 Type:
Temperature >
Channel 3 Type:
Temperature >
F1 Units:
L/s
F1 Units:
CF/h
F1 Units:
m3/h
F1 Units:
mL/s
F1 Units:
GPM
F1 Units:
gU/H
T2 Units:
°C >
T3 Units:
°C >
Func. 1 Type:
Diff >
Func. 1 Source:
Diff T2-T3 >
Function 2 Type:
Power 2 >
Power 2 Flow:
F1 >
Power 2 Unit:
kW >
Energy 2 Unit:
kWh >
Heat Capacity 1:
4.1840 kJ/kg*K >
Density 2:
999.97 kg/m3 >
Energy 2 Total:
Show Both >
Select Flow Channel 1 as the fl ow measurement used in the calculation of Power 2.
Default is the fi rst fl ow channel assigned.
Select the density of the liquid. If the Temperature units are set to °C, Density units are
fi xed at kg/m3. Factory setting is 999.97 kg/m3.
Choose: Show Cooling, Show Heating, or Show Both. Default is Show Both.
• If the Diff T2 – T3 value is positive, the heating totalizer will be incremented.
• If the Diff T2 – T3 value is negative, the cooling totalizer will be incremented.
Select power unit:
Choose: J/s, W, kW, BTU/m, BTU/h, kBTU/h. Default is kW.
Select energy unit:
Choose: J, kJ, MJ, GJ, kWh, MWh, BTU, kBTU, MBTU. Default is kWh.
Select heat capacity value.
Default is 4.1840 kJ/kg•K
Set Function 2 to operate as Power 2
Select T2-T3 as the source for the Differential measurement.
• To switch from heating to cooling mode, just change the order of the Delta Temperature
Sources. For example: Change the “Func. 1 Source” from “Diff T2 – T3” to “Diff T3 – T2”.
Set Function 1 to operate as a differential measurement.
3. In the Options Menu:
• Select the units for the two TEMPERATURE channels to °C or °F.
BOTH TEMPERATURE CHANNELS MUST BE SET TO THE SAME UNITS.
If the Temperature units are set to °C, Density units are fi xed at kg/m3. Heat Capacity Units are
fi xed at kJ/kg•K.
If the Temperature units are set to °F, Density units are fi xed at lbs/ft3. Heat Capacity Units are
fi xed at BTU/lbs•°F
2. In the Channel Settings Menu:
• Set the Flow Units to one of the following (the timebase can be set at any value.)
The units MUST BE EXACTLY AS ILLUSTRATED.
G or g U.S. Gallons (examples: GPM, G/H, gpm, etc.)
GU or gU Imperial Gallons (examples: GU/m, gU/h, GU)
L or l Liters (examples: _L/m, _LPM, _l/h)
mL or ml Milliliters (examples: mL/s, ml/m)
CF or cf Cubic Feet (examples: CF/h, cf/d, CFPD)
M3 or m3 Cubic Meters (examples: M3/h, m3/d, m3/h)
1. In the System Setup Menu:
• Assign a FLOW channel to Channel 1 or Channel 4.
(IMPORTANT: must be these channels only)
• Assign two TEMPERATURE channels.
If FLOW is on channel 1, then TEMPERATURE must be on channels 2 and 3.
If FLOW is on channel 4, then TEMPERATURE must be on channels 5 and 6.
(The examples on this page depict the use of channels 1, 2 and 3. For a second Power
measurement, assign Flow to channel 4 and Temperature to channels 5 and 6.)
Quick Setup Confi guration