|Item code||Model number|
The Model 20-CTR is designed
to monitor the whole house load, inverter output, generator output, etc. The
meter consists of a easy to install current transducer (CT) (2 for 2 phase 240
vac applications), a base module and an attractive oak trimmed panel mount display.
The remote display can be mounted up to several hundred feet from the base module
using inexpensive CAT5 LAN cable (can be provided). The meter features both
a "permanent" and resettable kw-hr and cost display, as well as watts,
peak watts and cost information (similar to the Model 4 series). The meter can
be configured for 120 or 120/240 operation and will monitor up to 9999 watts.
Digital Power Meter: Interior Wall Mounted, Remote Display
The metering instrument consists of two general components: a surface mount base unit for connecting to AC voltage and AC current and a remote, flush mounted display unit. The base and display are connected using standard CAT-5 LAN cable. AC current is monitored using a standard snap on current transducer (CT). AC voltage is sensed via two fused input lines to a step down transformer (located inside the base unit).
Locate the base unit as close to the supply as possible. Plan for routing of the CT and the two fused voltage sense wires. The connections are provided with a polarized 4 connector plug to the base unit. The remote display may be mounted up to 100 ft from the base unit. Attach the CT around either the Line or Neutral (for 120 vac systems), or L1 and L2 (for 240 vac systems). Generally install the CT with the label toward the source. Connect the two fused voltage sense wire across the output of the system.(120vac L1 and Neutral; 220vac L1,L2). These wires are shipped with no end preparation. Attach ring connectors, plugs or strip back bare end as installation requirements dictate. A phase reverse jumper at the display can be used to correct any phase reversal caused by installation configuration. The base unit has an LED, which will illuminate when ac voltage is present. The display is designed to mount in a standard triple gang electrical box, or equivalent. Route up to 100 ft of CAT 5 cable from the base unit to the display. Connect the base unit to the display by plugging in the CAT 5 cable into the RJ-45 jacks on the base and display units. Energize the system. If voltage is present at the display unit, the LED on the display unit will illuminate. If the system does not read proper power indication when the system is producing power, change the position of the jumper on the back of the display unit. The jumper must be on two of the three pins. The meter begins operation as soon as it is energized.
|MODEL||4-1850||20-1850, 21-1850CI and 20-1850CI||20-CTR Whole House|
|Input Limits||15 amps/120 vac||15 amps/120 vac||40 amps/240 vac|
|USER COST (c/kwhr)||0-.99||0-.99||0-.99|
|Avg Monthly Cost||YES||YES||YES|
|AMPS RMS||n/a||.20-15.00 (+/-3%)*||n/a|
|POWER FACTOR||n/a||0.00-1.00 (+/- 5%)||n/a|
|VARS||n/a||20-1850 (+/- 5%)*||n/a|
|VOLT-AMPS||n/a||20-1850 (+/- 5%)*||n/a|
21 AND CI: WATTS ONLY
|MEMORY (Kw-hrs ,cost, timer)||YES||YES||YES|
(accept as noted)
|+/- 2% +/- 2 lsd||+/- 1.5% +/-2 lsd||+/- 2% +/- 2 lsd|
|Sample memory (average power during interval)||n/a||8121 samples (21-1850CI)||n/a|
|Sample Interval||n/a||1 min- 2 hours (21-1850CI)||n/a|
|RS-232 specs||n/a||8N1, 9600 bps (21-1850CI and 20-1850CI)||n/a|
|User Recalibration Capability||YES||YES||YES|
Your inverter output
remote display has 4 pressure sensitive switches:
,, [>]. and [<].
The initial display on power up or when the Reset button is pushed shows two values: the Watts being produced now and the lifetime generated output in KW-HRS (Kilowatt hours).
Pressing the [>] and [<] keys will move the display through several modes. Note: Pressing at any time will return the unit to the Initial Display. Should the meter appear to lock up, press to clear.
1. Pressing the [>] switch will display the dollar value of electricity produced and the cents per KWHR used in the calculation. The value of generation produced is permanently stored in memory. The unit cost value, cents/kwhr, is user programmable from this screen. Press to enter into the change mode. Press the [<] or [>] keys to change the value. Press to set the value. Pressing the switch to enter the change mode will display the value to 1/10th of a cent. This more precise value is the number used in calculating dollar values. Press twice to view the change mode and the cents/KWHR in 1/10th cents and return to the display mode without changing the setting.
Note: The normal display mode shows costs in whole cents.
2. Pressing the [>] switch a second time will cause the unit to display Peak Watts. Pressing the switch will remove the stored value from memory. The Peak Watts displayed is the value of Peak Watts that the system produced since the last time the value was cleared from memory by pressing the switch.
3. Pressing the [>] switch a third time will cause the unit to display the dollar value of electrical generation and the KWHRs produced since the last time the memory was cleared. Clear memory was pressing the switch while in this display mode. Some users may choose to register on the first day of each month to show the dollar value and the KWHRs produced each month.
4. Pressing the [>] switch again will return the display to the Initial Display.
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