Threshold alerts and SMTP
Thresholds on the monitoring board raise an SMTP message through the same interface that serves the web page. The message names the line and the value that crossed the set point, and the crossing is written into the log.
- Message path
- SMTP
- Set points
- settable per line
- Temperature
- -30°C ~ 100°C
- Humidity
- 1% ~ 99%
- Resolution
- 1°C · 1%
Alert lines
What each line can raise
One row per line that can carry a set point, and what the crossing sends. Set points are written per line on the same sheet as the metering scope, so the alert and the meter stay in step.
| Line | Set point | Sent at the crossing |
|---|---|---|
| Feed current | settable per feed, 0.1A scale | message and a dated log entry |
| Total current | settable on the feed sum | message and a dated log entry |
| Voltage | settable in a 90V ~ 350V window | message and a dated log entry |
| Active power | settable per feed, ±1% reading | message and a dated log entry |
| Temperature | settable across -30°C ~ 100°C, 1°C | message and a dated log entry |
| Humidity | settable across 1% ~ 99%, 1% | message and a dated log entry |
| Message path | SMTP from the monitoring board | to the address named on the request |
| Local repeat | OLED and the embedded web page | the same value, visible at the rack |
| Log entry | dated by the RTC | read over Ethernet or RS485 |
| Retention | up to 20,000 entries | room for the window around a fault |
Delivery
Where the message goes
- SenderThe monitoring board
- PathSMTP
- RecipientAddress named on the request
- Local fallbackOLED and web page
- Written toEvent log, dated by the RTC
From requirement to mechanism
A message that arrives with the line and the value
A threshold that only lights a lamp in the hall depends on somebody walking past. Here the crossing leaves as an SMTP message naming the line and the value, and the same crossing is written into the log with the time from the RTC, so the message and the record carry the same evidence.
- Message carries
- line · value
- Written at the same moment
- dated log entry
- Sensor range
- -30°C ~ 100°C · 1°C
- Humidity range
- 1% ~ 99% · 1%
Meter row
One row per line a set point can sit on
Each row is a line on the reporting board: the item, the scale its set point is written at, what the crossing triggers, and where the same value is repeated.
Feed current
0.1A
Set point per feed, at ±1% plus one digit behind the reading
SMTP · event log
Total current
0.1A
Set on the sum for the feed rather than on one outlet
SMTP · event log
Voltage
1V
Set inside the 90V to 350V window, with line and phase readings on three-phase builds
SMTP · event log
Active power
±1%
Set per feed, at the accuracy of the reading behind it
SMTP · event log
Temperature
1°C
Optional sensor over -30°C to 100°C, at the inlet or the rack front
SMTP · OLED
Humidity
1%
Optional sensor covering 1% to 99%, reported beside temperature
SMTP · OLED
Energy total
0.1kWh
Billing-grade total at 1 grade, carried in the same log as the crossings
SNMP · Modbus · event log
Setting a set point
From a named line to a message
Three stages, in order. The first is decided with the buyer; the other two run on the board without a platform behind them.
Name the line and the set point
The line, the value and the address for the message are written on the same sheet as the metering scope, so the alert matches the meter it watches.
Compare on each sample
The board compares the reading against the set point on every cycle, at the published scale for that line.
Send and write
On a crossing the SMTP message leaves and the entry is written into the log with the time from the RTC, so the message can be matched to the record.
Request a quote
Send the lines to watch, get the set point list
Outlet combination, current per feed, metering depth and remote switching. The reply carries the lines that can raise a message and a per-line specification sheet, in English.
Reply within 12 hours on working days. No lead time and no minimum quantity figure is published on this site.